320330031231 has 32 divisors (see below), whose sum is σ = 500250981888. Its totient is φ = 178501340160.

The previous prime is 320330031199. The next prime is 320330031247. The reversal of 320330031231 is 132130033023.

It is not a de Polignac number, because 320330031231 - 2⁵ = 320330031199 is a prime.

It is a super-2 number, since 2×320330031231² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 320330031198 and 320330031207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320330031271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1869831 + ... + 2033943.

It is an arithmetic number, because the mean of its divisors is an integer number (15632843184).

Almost surely, 2^320330031231 is an apocalyptic number.

320330031231 is a deficient number, since it is larger than the sum of its proper divisors (179920950657).

320330031231 is a wasteful number, since it uses less digits than its factorization.

320330031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166431.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 320330031231 its reverse (132130033023), we get a palindrome (452460064254).

The spelling of 320330031231 in words is "three hundred twenty billion, three hundred thirty million, thirty-one thousand, two hundred thirty-one".